Ball valve



FIG. 1 is a perspective view of a ball valve showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings are for the purpose of illustrating unclaimed portions of the ball valve and form no part of the claimed design. 

CLAIM The ornamental design for a ball valve, as shown and described. 